P0934high severityPowertrain
Hydraulic Pressure Sensor Circuit Low
on 2003 Audi A6 3.0L V6 · AWD
What this code means
The PCM detected a low voltage condition in the transmission hydraulic pressure sensor circuit. This can lead to improper pressure regulation and shifting problems.
Symptoms
- Slipping transmission
- Harsh or erratic shifts
- Transmission warning light
Common causes
- Short to ground in sensor circuit
- Faulty hydraulic pressure sensor
- Damaged wiring or connector
- PCM/TCM circuit fault
Diagnostic steps
- Scan for codes and freeze frame data
- Check sensor circuit for short to ground
- Inspect wiring and connector condition
- Test sensor voltage and replace if faulty
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